Ionization in vacuum ultraviolet F2 laser ablated polymer plumes

Dyer, P. E.; Pervolaraki, M.; Walton, C. D.; Lippert, T.; Kuhnke, M.; Wokaun, A.

Abstract

An experimental investigation of ion generation in the 157-nm vacuum ultraviolet (VUV) F-2 laser ablation of three selected polymers - glycidyl azide polymer (GAP), a triazene polymer (TP6) and polyimide - is described. An ion collector probe is used to determine the relative ion yield and white-light interferometry of ablated surfaces to ascertain mass-removal levels. The findings indicate that ions are generated under the action of the VUV laser pulse at fluences down to at least as low as the threshold for material removal. A two-photon photoionization model is proposed that provides a good description of the results.

Citation

Dyer, P. E., Pervolaraki, M., Walton, C. D., Lippert, T., Kuhnke, M., & Wokaun, A. (2008). Ionization in vacuum ultraviolet F2 laser ablated polymer plumes. Applied physics. A, Materials science & processing, 90(3), 403-409. https://doi.org/10.1007/s00339-007-4341-x

• Journal Article Type: Article
• Online Publication Date: Nov 30, 2007
• Publication Date: 2008-03
• Journal: APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
• Print ISSN: 0947-8396
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 90
• Issue: 3
• Pages: 403-409
• DOI: https://doi.org/10.1007/s00339-007-4341-x
• Keywords: Polyimide; Material removal; Vacuum ultraviolet; Glycidyl azide polymer; White light interferometer
• Public URL: https://hull-repository.worktribe.com/output/391200
• Publisher URL: https://link.springer.com/article/10.1007%2Fs00339-007-4341-x